EP4076035A1 - A component for an article for use in an aerosol delivery system - Google Patents
A component for an article for use in an aerosol delivery systemInfo
- Publication number
- EP4076035A1 EP4076035A1 EP20838243.2A EP20838243A EP4076035A1 EP 4076035 A1 EP4076035 A1 EP 4076035A1 EP 20838243 A EP20838243 A EP 20838243A EP 4076035 A1 EP4076035 A1 EP 4076035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aerosol
- article
- component
- tobacco
- additive release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/17—Filters specially adapted for simulated smoking devices
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/02—Cigars; Cigarettes with special covers
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
- A24D1/045—Cigars; Cigarettes with mouthpieces or filter-tips with smoke filter means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/20—Cigarettes specially adapted for simulated smoking devices
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
- A24D3/0216—Applying additives to filter materials the additive being in the form of capsules, beads or the like
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
- A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
- A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
- A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/20—Devices using solid inhalable precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
Definitions
- the present invention relates to a component for an article for use in an aerosol delivery system, an article for use in an aerosol delivery system, an aerosol delivery system including an article and a method of manufacturing a component for an article for use in an aerosol delivery system.
- tobacco industry products produce an aerosol during use, which is inhaled by a user.
- tobacco heating devices heat an aerosol generating substrate such as tobacco to form an aerosol by heating, but not burning, the substrate.
- tobacco industry products commonly include mouthpieces through which the aerosol passes to reach the user’s mouth.
- a component for an article for use in an aerosol delivery system comprising a body of fibrous material comprising first and second additive release components embedded within the body of fibrous material, wherein the first and second additive release components each have a maximum diameter between about 1.5mm and about 2.5mm and the first and second additive release components are separated by a distance of less than about 2.5mm.
- first and second additive release components each have a maximum diameter between about 1.5mm and about 2.5mm and the first and second additive release components are separated by a distance of less than about 2.5mm.
- an article for use in an aerosol delivery system the article comprising an aerosol generating material and a component according to the first aspect.
- a system comprising an article according to the second aspect and a non-combustible aerosol provision device for heating the aerosol generating material of the article.
- a method of manufacturing a component for an article for use in an aerosol delivery system comprising inserting first and second additive release components into a flow of fibrous material and forming said flow of fibrous material into a body of fibrous material comprising said first and second additive release components embedded within the body, wherein the first and second additive release components each have a maximum diameter between about 1.5mm and about 2.5mm and the first and second additive release components are separated by a distance of less than about 2.5mm.
- Figure la is a side-on cross sectional view of an article, the article including a mouthpiece
- Figure lb is a cross sectional view of the mouthpiece shown in Figure la;
- Figure 2 is a perspective illustration of a non-combustible aerosol provision device, suitable for generating aerosol from the aerosol generating material of the articles of Figures la and lb;
- Figure 3 illustrates the device of Figure 2 with the outer cover removed and without an article present
- Figure 4 is a side view of the device of Figure 2 in partial cross-section
- Figure 5 is an exploded view of the device of Figure 2, with the outer cover omitted;
- Figure 6A is a cross sectional view of a portion of the device of Figure 2;
- the term “delivery system” is intended to encompass systems that deliver at least one substance to a user, and includes: combustible aerosol provision systems, such as cigarettes, cigarillos, cigars, and tobacco for pipes or for roll-your-own or for make-your-own cigarettes (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco substitutes or other smokable material); non-combustible aerosol provision systems that release compounds from an aerosol-generating material without combusting the aerosol-generating material, such as electronic cigarettes, tobacco heating products, and hybrid systems to generate aerosol using a combination of aerosol-generating materials; and aerosol-free delivery systems that deliver the at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff, wherein the at least one substance may or may not
- a “combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is combusted or burned during use in order to facilitate delivery of at least one substance to a user.
- the delivery system is a combustible aerosol provision system, such as a system selected from the group consisting of a cigarette, a cigarillo and a cigar.
- the disclosure relates to a component for use in a combustible aerosol provision system, such as a filter, a filter rod, a filter segment, a tobacco rod, a spill, an aerosol-modifying agent release component such as a capsule, a thread, or a bead, or a paper such as a plug wrap, a tipping paper or a cigarette paper.
- a component for use in a combustible aerosol provision system such as a filter, a filter rod, a filter segment, a tobacco rod, a spill, an aerosol-modifying agent release component such as a capsule, a thread, or a bead, or a paper such as a plug wrap, a tipping paper or a cigarette paper.
- a “non-combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is not combusted or burned in order to facilitate delivery of at least one substance to a user.
- the delivery system is a non-combustible aerosol provision system, such as a powered non-combustible aerosol provision system.
- the non-combustible aerosol provision system is an electronic cigarette, also known as a vaping device or electronic nicotine delivery system (END), although it is noted that the presence of nicotine in the aerosol-generating material is not a requirement.
- END electronic nicotine delivery system
- the non-combustible aerosol provision system is an aerosol- generating material heating system, also known as a heat-not-burn system.
- An example of such a system is a tobacco heating system.
- the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosol-generating materials, one or a plurality of which may be heated.
- Each of the aerosol-generating materials may be, for example, in the form of a solid, liquid or gel and may or may not contain nicotine.
- the hybrid system comprises a liquid or gel aerosol-generating material and a solid aerosol-generating material.
- the solid aerosol-generating material may comprise, for example, tobacco or a non-tobacco product.
- the non-combustible aerosol provision system may comprise a non combustible aerosol provision device and a consumable for use with the non combustible aerosol provision device.
- the disclosure relates to consumables comprising aerosol- generating material and configured to be used with non-combustible aerosol provision devices. These consumables are sometimes referred to as articles throughout the disclosure.
- the non-combustible aerosol provision system such as a non-combustible aerosol provision device thereof, may comprise a power source and a controller.
- the power source may, for example, be an electric power source or an exothermic power source.
- the exothermic power source comprises a carbon substrate which maybe energised so as to distribute power in the form of heat to an aerosol-generating material or to a heat transfer material in proximity to the exothermic power source.
- the non-combustible aerosol provision system may comprise an area for receiving the consumable, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/or an aerosol-modifying agent.
- the consumable for use with the non-combustible aerosol provision device may comprise aerosol-generating material, an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.
- the substance to be delivered comprises an active substance.
- the active substance as used herein may be a physiologically active material, which is a material intended to achieve or enhance a physiological response.
- the active substance may for example be selected from nutraceuticals, nootropics, psychoactives.
- the active substance maybe naturally occurring or synthetically obtained.
- the active substance may comprise for example nicotine, caffeine, taurine, theine, vitamins such as B6 or Bi2 or C, melatonin, cannabinoids, or constituents, derivatives, or combinations thereof.
- the active substance may comprise one or more constituents, derivatives or extracts of tobacco, cannabis or another botanical.
- the active substance comprises nicotine.
- the active substance comprises caffeine, melatonin or vitamin B12.
- Aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way. Aerosol-generating material may, for example, be in the form of a solid, liquid or gel which may or may not contain an active substance and/or flavourants.
- the aerosol generating material may comprise an “amorphous solid”, which may alternatively be referred to as a “monolithic solid” (i.e. non-fibrous).
- the amorphous solid maybe a dried gel.
- the amorphous solid is a solid material that may retain some fluid, such as liquid, within it.
- the aerosol generating material may for example comprise from about 50wt%, 6owt or 70wt% of amorphous solid, to about 90wt%, 95wt% or ioowt of amorphous solid.
- the aerosol-generating material may comprise one or more active substances and/or flavours, one or more aerosol-former materials, and optionally one or more other functional material.
- the aerosol-former material may comprise one or more constituents capable of forming an aerosol.
- the aerosol-former material may comprise one or more of glycerine, glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.
- the one or more other functional materials may comprise
- the materials described herein maybe present on or in a support, to form a substrate.
- the support may, for example, be or comprise paper, card, paperboard, cardboard, reconstituted material, a plastics material, a ceramic material, a composite material, glass, a metal, or a metal alloy.
- the support comprises a susceptor.
- the susceptor is embedded within the material. In some alternative embodiments, the susceptor is on one or either side of the material.
- a consumable is an article comprising or consisting of aerosol-generating material, part or all of which is intended to be consumed during use by a user.
- a consumable may comprise one or more other components, such as an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generation area, a housing, a wrapper, a mouthpiece, a filter and/ or an aerosol-modifying agent.
- a consumable may also comprise an aerosol generator, such as a heater, that emits heat to cause the aerosol-generating material to generate aerosol in use.
- the heater may, for example, comprise combustible material, a material heatable by electrical conduction, or a susceptor.
- An aerosol-modifying agent is a substance, typically located downstream of the aerosol generation area, that is configured to modify the aerosol generated, for example by changing the taste, flavour, acidity or another characteristic of the aerosol.
- the aerosol modifying agent may be provided in an aerosol-modifying agent release component, that is operable to selectively release the aerosol-modifying agent
- the aerosol-modifying agent may, for example, be an additive or a sorbent.
- the aerosol-modifying agent may, for example, comprise one or more of a flavourant, a colourant, water, and a carbon adsorbent.
- the aerosol-modifying agent may, for example, be a solid, a liquid, or a gel.
- the aerosol-modifying agent maybe in powder, thread or granule form.
- the aerosol-modifying agent may be free from filtration material.
- a susceptor is a material that is heatable by penetration with a varying magnetic field, such as an alternating magnetic field.
- the susceptor maybe an electrically-conductive material, so that penetration thereof with a varying magnetic field causes induction heating of the heating material.
- the heating material may be magnetic material, so that penetration thereof with a varying magnetic field causes magnetic hysteresis heating of the heating material.
- the susceptor maybe both electrically-conductive and magnetic, so that the susceptor is heatable by both heating mechanisms.
- the device that is configured to generate the varying magnetic field is referred to as a magnetic field generator, herein.
- An aerosol generator is an apparatus configured to cause aerosol to be generated from the aerosol-generating material.
- the aerosol generator is a heater configured to subject the aerosol-generating material to heat energy, so as to release one or more volatiles from the aerosol-generating material to form an aerosol.
- the aerosol generator is configured to cause an aerosol to be generated from the aerosol-generating material without heating.
- the aerosol generator may be configured to subject the aerosol-generating material to one or more of vibration, increased pressure, or electrostatic energy.
- Induction heating is a process in which an electrically-conductive object is heated by penetrating the object with a varying magnetic field. The process is described by Faraday's law of induction and Ohm's law.
- An induction heater may comprise an electromagnet and a device for passing a varying electrical current, such as an alternating current, through the electromagnet.
- a varying electrical current such as an alternating current
- the electromagnet and the object to be heated are suitably relatively positioned so that the resultant varying magnetic field produced by the electromagnet penetrates the object, one or more eddy currents are generated inside the object.
- the object has a resistance to the flow of electrical currents. Therefore, when such eddy currents are generated in the object, their flow against the electrical resistance of the object causes the object to be heated. This process is called Joule, ohmic, or resistive heating.
- An object that is capable of being inductively heated is known as a susceptor.
- the susceptor is in the form of a closed circuit. It has been found that, when the susceptor is in the form of a closed circuit, magnetic coupling between the susceptor and the electromagnet in use is enhanced, which results in greater or improved Joule heating.
- Magnetic hysteresis heating is a process in which an object made of a magnetic material is heated by penetrating the object with a varying magnetic field.
- a magnetic material can be considered to comprise many atomic-scale magnets, or magnetic dipoles. When a magnetic field penetrates such material, the magnetic dipoles align with the magnetic field.
- a varying magnetic field such as an alternating magnetic field, for example as produced by an electromagnet
- the orientation of the magnetic dipoles changes with the varying applied magnetic field.
- Such magnetic dipole reorientation causes heat to be generated in the magnetic material.
- Articles, such as consumables described herein, for instance those in the shape of rods, are often named according to the product length: “regular” (typically in the range 68 - 75 mm, e.g. from about 68 mm to about 72 mm), “short” or “mini” (68 mm or less), “king size” (typically in the range 75 - 91 mm, e.g. from about 79 mm to about 88 mm), “long” or “super-king” (typically in the range 91 - 105 mm, e.g. from about 94 mm to about 101 mm) and “ultra-long” (typically in the range from about no mm to about 121 mm).
- an article in a king-size, super-slim format will, for example, have a length of about 83 mm and a circumference of about 17 mm.
- Articles may include an aerosol-generating material and a downstream portion downstream of the aerosol-generating material, and each format maybe produced with downstream portions of different lengths.
- the downstream portion length will usually be from about 30 mm to 50 mm.
- a tipping paper connects the downstream portion to the aerosol generating material and will usually have a greater length than the downstream portion, for example from 3 to 10 mm longer, such that the tipping paper covers the downstream portion and overlaps the aerosol generating material, for instance in the form of a rod, to connect the downstream portion to the rod.
- Articles and their aerosol generating materials and downstream portions described herein can be made in, but are not limited to, any of the above formats.
- upstream and downstream used herein are relative terms defined in relation to the direction of mainstream aerosol drawn though an article or device in use.
- the filamentary tow material described herein can comprise cellulose acetate fibre tow.
- the filamentary tow can also be formed using other materials used to form fibres, such as polyvinyl alcohol (PVOH), polylactic acid (PLA), polycaprolactone (PCL), poly(i-4 butanediol succinate) (PBS), poly(butylene adipate-co-terephthalate)(PBAT), starch based materials, cotton, aliphatic polyester materials and polysaccharide polymers or a combination thereof.
- the filamentary tow may be plasticised with a suitable plasticiser for the tow, such as triacetin where the material is cellulose acetate tow, or the tow may be non-plasticised.
- the tow can have any suitable specification, such as fibres having a ⁇ ’ shaped or other cross section such as ‘X’ shaped, filamentary denier values between 2.5 and 15 denier per filament, for example between 8.0 and 11.0 denier per filament and total denier values of 5,000 to 50,000, for example between 10,000 and 40,000.
- suitable specification such as fibres having a ⁇ ’ shaped or other cross section such as ‘X’ shaped, filamentary denier values between 2.5 and 15 denier per filament, for example between 8.0 and 11.0 denier per filament and total denier values of 5,000 to 50,000, for example between 10,000 and 40,000.
- the cross section of the fibres may have an isoperimetric ratio L 2 /A of 25 or less, 20 or less, or 15 or less, where L is the length of the perimeter of the cross section and A is the area of the cross section.
- Such fibres have a relatively low surface area for a given value of denier per filament, which improves delivery of aerosol to the consumer.
- tobacco material refers to any material comprising tobacco or derivatives or substitutes thereof.
- tobacco material may include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes.
- the tobacco material may comprise one or more of ground tobacco, tobacco fibre, cut tobacco, extruded tobacco, tobacco stem, tobacco lamina, reconstituted tobacco and/or tobacco extract.
- the active substance may comprise or be derived from one or more botanicals or constituents, derivatives or extracts thereof.
- botanical includes any material derived from plants including, but not limited to, extracts, leaves, bark, fibres, stems, roots, seeds, flowers, fruits, pollen, husk, shells or the like.
- the material may comprise an active compound naturally existing in a botanical, obtained synthetically.
- the material may be in the form of liquid, gas, solid, powder, dust, crushed particles, granules, pellets, shreds, strips, sheets, or the like.
- Example botanicals are tobacco, eucalyptus, star anise, hemp, cocoa, cannabis, fennel, lemongrass, peppermint, spearmint, rooibos, chamomile, flax, ginger, ginkgo biloba, hazel, hibiscus, laurel, licorice (liquorice), matcha, mate, orange skin, papaya, rose, sage, tea such as green tea or black tea, thyme, clove, cinnamon, coffee, aniseed (anise), basil, bay leaves, cardamom, coriander, cumin, nutmeg, oregano, paprika, rosemary, saffron, lavender, lemon peel, mint, juniper, elderflower, vanilla, wintergreen, beefsteak plant, curcuma, turmeric, sandalwood, cilantro, bergamot, orange blossom, myrtle, cassis, valerian, pimento, mace, damien, marjoram, olive, lemon
- the mint may be chosen from the following mint varieties: Mentha Arventis, Mentha c.v., Mentha niliaca, Mentha piperita, Mentha piperita citrata c.v., Mentha piperita c.v, Mentha spicata crispa, Mentha cardifolia, Memtha longifolia, Mentha suaveolens variegata, Mentha pulegium, Mentha spicata c.v. and Mentha suaveolens
- the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is tobacco. In some embodiments, the active substance comprises or derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from eucalyptus, star anise, cocoa and hemp. In some embodiments, the active substance comprises or derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from rooibos and fennel.
- the substance to be delivered comprises a flavour.
- flavour and “flavourant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers. They may include naturally occurring flavour materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice (liquorice), hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch,
- the flavour comprises menthol, spearmint and/ or peppermint.
- the flavour comprises flavour components of cucumber, blueberry, citrus fruits and/or redberry.
- the flavour comprises eugenol.
- the flavour comprises flavour components extracted from tobacco.
- the flavour comprises flavour components extracted from cannabis.
- the flavour may comprise a sensate, which is intended to achieve a somatosensorial sensation which are usually chemically induced and perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in addition to or in place of aroma or taste nerves, and these may include agents providing heating, cooling, tingling, numbing effect.
- a suitable heat effect agent may be, but is not limited to, vanillyl ethyl ether and a suitable cooling agent may be, but not limited to eucolyptol, WS-3.
- Figure la is a side-on cross sectional view of an article 1 including a component 2, in the present example a mouthpiece 2 at least part of which is arranged to be received in the user’s mouth, for use in an aerosol provision system.
- Figure lb is a cross sectional view of the mouthpiece shown in Figure la through the line A- A’ thereof.
- the component 2 may comprise a portion of the article 1 which is not arranged to be received in a user’s mouth.
- the article 1 comprises a cylindrical rod of aerosol generating material 3, in the present case tobacco material, connected to the mouthpiece 2.
- the mouthpiece 2 includes a section 6 having a longitudinal axis ‘X’ and a cross sectional area measured perpendicularly to the longitudinal axis.
- the terms ‘longitudinal’ and ‘longitudinally’ refer to a direction along the longitudinal axis X of the article 1, while the terms ‘transverse’ and ‘transversely refer to a direction substantially perpendicular to the longitudinal axis X of the article 1.
- the section 6, in the present example comprises a body of material.
- the body of material is, in the present example, in the shape of a cylinder.
- First and second breakable capsules na, nb are disposed in the body of material.
- the body of material is preferably substantially uniform in density throughout the cylinder.
- the length of the body of material 6 is less than about 15 mm. More preferably, the length of the body of material 6 is less than about 10 mm. In addition, or as an alternative, the length of the body of material 6 is at least about 5 mm. Preferably, the length of the body of material 6 is at least about 6 mm.
- the length of the body of material 6 is from about 5 mm to about 15 mm, more preferably from about 6 mm to about 12 mm, even more preferably from about 6 mm to about 10 mm, most preferably about 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. In the present example, the length of the body of material 6 is 10 mm.
- the body of material 6 is formed from filamentary tow.
- the tow used in the body of material 6 has a denier per filament of 8.4 and a total denier of 21,000.
- the tow can, for instance have a denier per filament (d.p.f.) of 9.5 and a total denier of 12,000.
- the tow may have a d.p.f. of 6 and a total denier of 17,000 or a d.p.f. of 8.0 and a total denier of 15,000 .
- the tow comprises plasticised cellulose acetate tow.
- the plasticiser used in the tow comprises about 8% by weight of the tow, although can be between about 5% and about 12%.
- the plasticiser is triacetin.
- the body 6 can be formed from tows other than cellulose acetate, for instance polylactic acid (PLA), other materials described herein for filamentary tow or similar materials.
- PLA polylactic acid
- the tow is preferably formed from cellulose acetate.
- tow capability curve which represents the pressure drop through a length of rod formed using the tow, for each of a range of tow weights. Parameters such as the rod length and circumference, wrapper thickness and tow plasticiser level are specified, and these are combined with the tow specification to generate the tow capability curve, which gives an indication of the pressure drop which would be provided by different tow weights between the minimum and maximum weights achievable using standard filter rod forming machinery.
- Such tow capability curves can be calculated, for instance, using software available from tow suppliers.
- a body of material 6 which includes filamentary tow having a weight per mm of length of the body of material 6 which is between about 10% and about 30% of the range between the minimum and maximum weights of a tow capability curve generated for the filamentary tow.
- This can provide an acceptable balance between providing enough tow weight to avoid shrinkage after the body 6 has been formed, providing an acceptable pressure drop, while also assisting with capsule placement within the tow, for instance for capsules of the sizes described herein.
- the body 6 can be formed from paper, for instance in a similar way to paper filters known for use in cigarettes.
- the body 6 can be formed from tows other than cellulose acetate, for instance polylactic acid (PLA), other materials described herein for filamentary tow or similar materials.
- the tow whether formed from cellulose acetate or other materials, preferably has a d.p.f. of at least 5, more preferably at least 6 and still more preferably at least 7. These values of denier per filament provide a tow which has relatively coarse, thick fibres with a lower surface area which result in a lower pressure drop across the mouthpiece 2 than tows having lower d.p.f.
- the tow has a denier per filament of no more than 12 d.p.f., preferably no more than 11 d.p.f. and still more preferably no more than 10 d.p.f.
- the total denier of the tow forming the body of material 6 is preferably at most 30,000, more preferably at most 28,000 and still more preferably at most 25,000. These values of total denier provide a tow which takes up a reduced proportion of the cross sectional area of the mouthpiece 2 which results in a lower resistance to draw, and therefore pressure drop, across the mouthpiece 2 than tows having higher total denier values.
- the tow preferably has a total denier of at least 8,000 and more preferably at least 10,000.
- the denier per filament is between 5 and 12 while the total denier is between 10,000 and 20,000.
- the denier per filament is between 6 and 10 while the total denier is between 11,000 and 22,000.
- the cross-sectional shape of the filaments of tow are ⁇ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used, with the same d.p.f. and total denier values as provided herein.
- An aerosol modifying agent is provided within the body of material 6, in the present example in the form of capsules 11a, 11b, and an oil-resistant first plug wrap 7 surrounds the body of material 6.
- the body of material 6 is in the form of a cylinder having a longitudinal axis and the capsules na, nb are embedded within the body of material 6 such that capsules na, nb are surrounded by the material forming the body 6.
- the capsules na, nb have a shell encapsulating a liquid aerosol modifying agent.
- the largest cross sectional area of the capsules measured perpendicularly to the longitudinal axis is less than about 28% of the cross sectional area of the body of material 6 measured perpendicularly to the longitudinal axis.
- each with a cross sectional area less than about 28% of the cross sectional area of the portion of the mouthpiece 2 in which the capsules 11a, 11b are provided has the advantage that the pressure drop across the mouthpiece 2 can be reduced as compared to a single capsule with a larger cross-sectional area and adequate space remains around the capsules for aerosol to pass without the body of material 6 removing significant amounts of the aerosol mass as it passes through the mouthpiece 2.
- the largest cross-sectional area of the each of the capsules 11a, 11b at its largest cross sectional area is less than 35% of the cross sectional area of the portion of the mouthpiece 2 in which the capsules 11a, 11b are provided, more preferably less than about 28% and still more preferably less than about 25%.
- the largest cross-sectional area of the each of the capsules 11a, 11b within the body 6 at its largest cross sectional area is between about 5% and about 24%, or between about 9% and about 22%, or between about 14% and about 21%.
- the largest cross sectional area of the capsule is 4.91 mm 2 .
- the body of material 6 has an outer circumference of about 16.8 mm, and the radius of this component will be 2.67 mm, corresponding to a cross sectional area of 22.46 mm 2 .
- the largest capsule cross sectional area is, in this example, about 21% of the cross-sectional area of the mouthpiece 2.
- the body of material 6 has an outer circumference of 20.8 mm, and the radius of this component will be 3.31 mm, corresponding to a cross sectional area of 34.43 mm 2 .
- the capsule cross sectional area is, in this example, 14.3% of the cross- sectional area of the mouthpiece 2.
- each of the capsules 11a, 11b has a diameter of 2.5 mm.
- Each of the capsules 11a, 11b can comprise a breakable capsule, for instance a capsule which has a solid, frangible shell surrounding a liquid payload.
- a breakable capsule for instance a capsule which has a solid, frangible shell surrounding a liquid payload.
- two capsules 11a, 11b are used.
- the capsules 11a, 11b are entirely embedded within the body of material 6.
- the capsules 11a, 11b are completely surrounded by the material forming the body 6.
- more than two breakable capsules may be disposed within the body of material 6, for instance 3, 4, 5 or more breakable capsules.
- the length of the body of material 6 can be increased to accommodate the number of capsules required.
- the individual capsules 11a, 11b may be the same as each other, or may differ from one another in terms of size and/or capsule payload.
- multiple bodies of material 6 maybe provided, with each body containing two or more capsules.
- the capsules 11a, 11b have a core-shell structure.
- the capsules each comprise a shell encapsulating a liquid agent, for instance a flavourant or other agent, which can be any one of the flavourants or aerosol modifying agents described herein.
- the shells of the capsules can be ruptured by a user to release the flavourant or other agent into the body of material 6.
- the mouthpiece further comprises a second plug wrap 9, and tipping paper 5.
- the first plug wrap 7 can comprise a barrier coating to make the material of the plug wrap substantially impermeable to the liquid payload of the capsule 11.
- the first plug wrap 7 is an oil-resistant plug wrap.
- the second plug wrap 9 and/or tipping paper 5 can comprise a barrier coating to make the material of that plug wrap and/or tipping paper substantially impermeable to the liquid payload of the capsules 11a, 11b.
- the capsules 11a, 11b are spherical and each has a diameter of about 2.5 mm. In other examples, other shapes and sizes of capsule can be used.
- the total combined weight of the capsules 11a, 11b may be in the range about 10 mg to about 50 mg.
- the capsules 11a 11b are located at a longitudinally central position within the body of material 6.
- capsule 11a is positioned such that its centre is 2.75 mm from the upstream end of the body of material 6, and capsule 11b is arranged axially aligned with, adjacent to and in an abutting relationship with capsule na, such that its centre is 2.75mm from the downstream end of the body of material 6.
- the point immediately between the 2.5 mm diameter capsules 11a, 11b is therefore 4mm from each end of the body of material 6.
- each of the capsules 11a, 11b can be located at a position other than a longitudinally central position in the body of material 6, i.e.
- capsules 11a and 11b may not be transversely aligned, and may be offset from one another in the direction along the A- A’ line of Figure 1, i.e. in the direction perpendicular to the longitudinal axis X of the article.
- the mouthpiece 2 is configured so that the capsules 11a, 11b and the ventilation holes 12 are longitudinally offset from each other in the mouthpiece 2.
- FIG. lb shows the capsule 11b, the body of material 6, the first and second plug wraps 7, 9 and the tipping paper 5.
- the capsule 11b is centred on the longitudinal axis (not shown) of the mouthpiece 2.
- the first and second plug wraps 7, 9 and tipping 5 are arranged concentrically around the body of material 6.
- capsule 11a is substantially the same as capsule 11b.
- the capsules 11a and 11b may differ in structure, shell composition, additive composition, diameter, or any of the other features described herein.
- the breakable capsules 11a, 11b have a core-shell structure. That is, the encapsulating material or barrier material creates a shell around a core that comprises the aerosol modifying agent.
- the shell structure hinders migration of the aerosol modifying agent during storage of the article 1 but allows controlled release of the aerosol modifying agent, also referred to as an aerosol modifier, during use.
- the barrier material also referred to herein as the encapsulating material
- the capsule is crushed or otherwise fractured or broken by the user to release the encapsulated aerosol modifier. Typically, the capsule is broken immediately prior to heating being initiated but the user can select when to release the aerosol modifier.
- breakable capsule refers to a capsule, wherein the shell can be broken by means of a pressure to release the core; more specifically the shell can be ruptured under the pressure imposed by the user's fingers when the user wants to release the core of the capsule.
- the barrier material is heat resistant. That is to say, in some cases, the barrier will not rupture, melt or otherwise fail at the temperature reached at the capsule site during operation of the aerosol provision device.
- a capsule located in a mouthpiece may be exposed to temperatures in the range of 30°C to ioo°C for example, and the barrier material may continue to retain the liquid core up to at least about 50°C to i20°C.
- the capsule releases the core composition on heating, for example by melting of the barrier material or by capsule swelling leading to rupture of the barrier material.
- the total weight of a capsule may be in the range of about 1 mg to about 100 mg, suitably about 5 mg to about 60 mg, about 8 mg to about 50 mg, about 10 mg to about 20 mg, or about 12 mg to about 18 mg.
- the total weight of the core formulation maybe in the range of about 2 mg to about 90 mg, suitably about 3 mg to about 70 mg, about 5 mg to about 25 mg, about 8 mg to about 20 mg, or about 10 mg to about 15 mg.
- the capsule according to the invention comprises a core as described above, and a shell.
- the capsules may present a crush strength from about 4.5 N to about 40 N, more preferably from about 5 N to about 30 N or to about 28 N (for instance about 9.8 N to about 24.5 N).
- the capsule burst strength can be measured when the capsule is removed from the body of material 6 and using a force gauge to measure the force at which the capsule bursts when pressed between two flat metal plates.
- a suitable measurement device is the Sauter FK 50 force gauge with a flat headed attachment, which can be used to crush the capsule against a flat, hard surface having a surface similar to the attachment.
- the capsules maybe substantially spherical and have a diameter of at least about 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 2.0 mm, 2.5 mm, 2.8 mm or 3.0 mm.
- the diameter of the capsules may be less than about 10.0 mm, 8.0 mm, 7.0 mm, 6.0 mm, 5.5 mm, 5.0 mm, 4.5 mm, 4.0 mm, 3.5 mm, 3.2 mm, or 2.5 mm.
- the capsule diameter may be in the range of about 0.4 mm to about 10.0 mm, about 0.8 mm to about 6.0 mm, about 2.5 mm to about 5.5 mm or about 2.8 mm to about 3.2 mm.
- the capsules may have a diameter of about 2.5 mm. These sizes are particularly suitable for incorporation of the capsules into an article as described herein.
- the pressure drop or difference (also referred to a resistance to draw) across the article reduces by less than about 15 mmH20 when both of the capsules are broken. More preferably, the open pressure drop reduces by less than about 10 mmH20 and more preferably less than about 8 mmH20 or less than about 6 mmH20. These values are measured as the average achieved by at least 80 articles made to the same design. Such small changes in pressure drop mean that other aspects of the product design, such as setting the correct ventilation level for a given product pressure drop, can be achieved irrespective of whether or not the consumer chooses to break the capsule.
- the barrier material may comprise one or more of a gelling agent, a bulking agent, a buffer, a colouring agent and a plasticiser.
- the gelling agent maybe, for example, a polysaccharide or cellulosic gelling agent, a gelatin, a gum, a gel, a wax or a mixture thereof.
- Suitable polysaccharides include alginates, dextrans, maltodextrins, cyclodextrins and pectins.
- Suitable alginates include, for instance, a salt of alginic acid, an esterified alginate or glyceryl alginate. Salts of alginic acid include ammonium alginate, triethanolamine alginate, and group I or II metal ion alginates like sodium, potassium, calcium and magnesium alginate.
- Esterified alginates include propylene glycol alginate and glyceryl alginate.
- the barrier material is sodium alginate and/ or calcium alginate.
- Suitable cellulosic materials include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, cellulose acetate and cellulose ethers.
- the gelling agent may comprise one or more modified starches.
- the gelling agent may comprise carrageenans.
- Suitable gums include agar, gellan gum, gum Arabic, pullulan gum, mannan gum, gum ghatti, gum tragacanth, Karaya, locust bean, acacia gum, guar, quince seed and xanthan gums.
- Suitable gels include agar, agarose, carrageenans, furoidan and furcellaran.
- Suitable waxes include carnauba wax.
- the gelling agent may comprise carrageenans and/or gellan gum; these gelling agents are particularly suitable for inclusion as the gelling agent as the pressure required to break the resulting capsules is particularly suitable.
- the barrier material may comprise one or more bulking agents, such as starches, modified starches (such as oxidised starches) and sugar alcohols such as maltitol.
- the barrier material may comprise a colouring agent which renders easier the location of the capsule within the aerosol generating device during the manufacturing process of the aerosol generating device.
- the colouring agent is preferably chosen among colorants and pigments.
- the barrier material may further comprise at least one buffer, such as a citrate or phosphate compound.
- the barrier material may further comprise at least one plasticiser, which maybe glycerol, sorbitol, maltitol, triacetin, polyethylene glycol, propylene glycol or another polyalcohol with plasticising properties, and optionally one acid of the monoacid, diacid or triacid type, especially citric acid, fumaric acid, malic acid, and the like.
- the amount of plasticiser ranges from 1% to 30% by weight, preferably from 2% to 15% by weight, and even more preferably from 3 to 10% by weight of the total dry weight of the shell.
- the barrier material may also comprise one or more filler materials.
- Suitable filler materials include comprising starch derivatives such as dextrin, maltodextrin, cyclodextrin (alpha, beta or gamma), or cellulose derivatives such as hydroxypropyl- methylcellulose (HPMC), hydroxypropylcellulose (HPC), methylcellulose (MC), carboxy-methylcellulose (CMC), polyvinyl alcohol, polyols or mixture thereof.
- Dextrin is a preferred filler.
- the amount of filler in the shell is at most 98.5%, preferably from 25 to 95% more preferably from 40 to 80% and even more preferably from 50 to 60 % by weight on the total dry weight of the shell.
- the capsule shell may additionally comprise a hydrophobic outer layer which reduces the susceptibility of the capsule to moisture-induced degradation.
- the hydrophobic outer layer is suitably selected from the group comprising waxes, especially carnauba wax, candelilla wax or beeswax, carbowax, shellac (in alcoholic or aqueous solution), ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyl- propylcellulose, latex composition, polyvinyl alcohol, or a combination thereof. More preferably, the at least one moisture barrier agent is ethyl cellulose or a mixture of ethyl cellulose and shellac.
- the capsule core comprises the aerosol modifier.
- This aerosol modifier may be any volatile substance which modifies at least one property of the aerosol.
- the aerosol substance may modify the pH, the sensorial properties, the water content, the delivery characteristics or the flavour.
- the aerosol modifier may be selected from an acid, a base, water or a flavourant.
- the aerosol modifier comprises one or more flavourants.
- the flavourant may suitably be licorice, rose oil, vanilla, lemon oil, orange oil, a mint- flavour, suitably menthol and/or a mint oil from any species of the genus Mentha such as peppermint oil and/or spearmint oil, or lavender, fennel or anise.
- the flavourant comprises menthol.
- the capsule may comprise at least about 25% w/w flavourant (based on the total weight of the capsule), suitably at least about 30% w/w flavourant, 35% w/w flavourant, 40% w/w flavourant, 45% w/w flavourant or 50% w/w flavourant.
- the core may comprise at least about 25% w/w flavourant (based on the total weight of the core), suitably at least about 30% w/w flavourant, 35% w/w flavourant, 40% w/w flavourant, 45% w/w flavourant or 50% w/w flavourant.
- the core may comprise less than or equal to about 75% w/w flavourant (based on the total weight of the core), suitably less than or equal to about 65% w/w flavourant, 55% w/w flavourant, or 50% w/w flavourant.
- the capsule may include an amount of flavourant in the range of 25-75% w/w (based on the total weight of the core), about 35-60% w/w or about 40-55% w/w.
- the capsules may include at least about 2 mg, 3 mg or 4 mg of the aerosol modifier, suitably at least about 4.5 mg of the aerosol modifier, 5 mg of the aerosol modifier, 5.5 of mg the aerosol modifier or 6 mg of the aerosol modifier.
- the consumable comprises at least about 7 mg of the aerosol modifier, suitably at least about 8 mg of the aerosol modifier, 10 mg of the aerosol modifier, 12 mg of the aerosol modifier or 15 mg of the aerosol modifier.
- the core may also comprise a solvent which dissolves the aerosol modifier.
- the solvent may suitably comprise short or medium chain fats and oils.
- the solvent may comprise tri-esters of glycerol such as C2-C12 triglycerides, suitably C6-C10 triglycerides or Cs- C12 triglycerides.
- the solvent may comprise medium chain triglycerides (MCT - C8-C12), which maybe derived from palm oil and/or coconut oil.
- the esters maybe formed with caprylic acid and/or capric acid.
- the solvent may comprise medium chain triglycerides which are caprylic triglycerides and/or capric tryglycerides.
- the solvent may comprise compounds identified in the CAS registry by numbers 73398-61-5, 65381-09-1, 85409-09-2. Such medium chain triglycerides are odourless and tasteless.
- the hydrophilic-lipophilic balance (HLB) of the solvent maybe in the range of 9 to 13, suitably 10 to 12.
- Methods of making the capsules include co-extrusion, optionally followed by centrifugation and curing and/or drying.
- WO 2007/010407 A2 is incorporated by reference, in its entirety.
- the part of the mouthpiece 2 in which the capsule is located reaches a temperature of between 58 and 70 degrees Centigrade during use of the system to generate the aerosol.
- the capsule contents are warmed sufficiently to promote volatisation of the capsule contents, for instance an aerosol modifying agent, into the aerosol formed by the system as the aerosol passes through the mouthpiece 2.
- Warming the content of the capsules 11a, 11b can take place, for instance, before the capsules 11a, 11b have been broken, such that when the capsules 11a, 11b are broken, the capsule contents are more readily released into the aerosol passing through the mouthpiece 2.
- the content of the capsules 11a, 11b can be warmed to this temperature after the capsules 11a, 11b have been broken, again resulting in the increased release of the content into the aerosol.
- mouthpiece temperatures in the range of 58 to 70 degrees Centigrade have been found to be high enough that the capsule content can be more readily released, but low enough that the outer surface of the portion of the mouthpiece 2 in which the capsule is located does not reach an uncomfortable temperature for the consumer to touch in order to burst the capsules 11a, 11b by squeezing on the mouthpiece 2.
- the temperature of the part of the mouthpiece 2 at which the capsules 11a, 11b are located can be measured using a digital thermometer with a penetration probe, arranged such that the probe enters the mouthpiece 2 through a wall of the mouthpiece 2 (forming a seal to limit the amount of external air which could leak into the mouthpiece around the probe) and is located close to the location of the capsules 11a, 11b, for instance between the capsules 11a, 11b.
- a temperature probe can be placed on the outer surface of the mouthpiece 2 to measure the temperature of the outer surface.
- Table 2.0 below shows the temperature at the location of the capsule in the mouthpiece 2 of an article used in an aerosol provision system during the first 5 puffs. Data is provided for an article when heated using a coil heating device as described herein with reference to Figures 2 to 6 using a ‘standard’ heating profile and for the same article when heated using the same device using a ‘boost’ heating profile.
- the ‘boost’ heating profile is user selectable and allows a higher heating temperature to be achieved.
- the temperature of the mouthpiece 2 at the location of capsule 11b reaches a maximum temperature of 61.5 °C under the ‘standard’ heating profile and a maximum of 63.8 °C under the ‘boost’ heating profile.
- a maximum temperature in the range of s8°C to 70°C, preferably in the range of 59°C to 6,5°C and more preferably in the range of 6o°C to 6s°C has been found to be particularly advantageous in relation to helping to volatise the contents of the capsules 11a, 11b while maintaining a suitable outer surface temperature of the mouthpiece 2.
- the capsules na, nb are breakable by external force applied to the mouthpiece 2, for instance by a consumer using their fingers or other mechanism to squeeze the mouthpiece 2.
- the part of the mouthpiece in which the capsule is located is arrange to reach a temperature of greater than 58°C during use of the aerosol provision system to generate an aerosol.
- the burst strength of the capsules 11a, 11b when located within the mouthpiece 2 and prior to heating of the aerosol generating material 3 is between 1500 and 4000 grams force.
- the burst strength of the capsules 11a, 11b when located within the mouthpiece 2 and within 30 seconds of use of the aerosol provision system to generate an aerosol is between 1000 and 4000 grams force.
- the capsules 11a, 11b are able to maintain a burst strength within a range which has been found to enable the capsules to be readily crushable by a consumer, while providing the consumer with sufficient tactile feedback that the capsules 11a, 11b have been broken. Maintaining such a burst strength is achieved by selecting an appropriate gelling agent for the capsule, as described herein, such as a polysaccharide including, for instance, gum Arabic, gellan gum, acacia gum, xanthan gums or carrageenans, alone or in combination with gelatine. In addition, a suitable wall thickness for the capsule shell should be selected.
- the burst strength of the capsule when located within the mouthpiece and prior to heating of the aerosol generating material is between 2000 and 3500 grams force, or between 2500 and 3500 grams force.
- the burst strength of the capsule when located within the mouthpiece and within 30 s of use of the system to generate an aerosol is between 1500 and 4000 grams force, or between 1750 and 3000 grams force.
- the average burst strength of the capsule when located within the mouthpiece and prior to heating of the aerosol generating material is about 3175 grams force and the average burst strength of the capsule when located within the mouthpiece and within 30 s of use of the system to generate an aerosol is about 2345 grams force.
- the burst strength of the capsule can be tested using a force measuring instrument such as a Texture Analyser.
- a Type TAXTPlus Texture Analyser can be used with a circular shaped metal probe having a 6mm diameter centred on the location of the capsule (i.e. 12mm from the mouth end of the mouthpiece 2).
- the test speed of the probe can be 0.3 mm/second, while a pre-test speed of 5.00 mm/ second can be used and a post-test speed of 10 mm/second.
- the force used can be 5000 g.
- the articles tested can be drawn on using a Borgwaldt A14 Syringe drive Unit following the known Health Canada Intense puffing regime (55 ml puff volume applied for 2 seconds duration every 30 seconds) using standard testing equipment. Three puffs can be performed using this puffing regime and the capsule burst strength measured within 30 seconds of the third puff.
- the aerosol generating material 3 provides an aerosol when heated, for instance within a non-combustible aerosol provision device as described herein, for instance a non combustible aerosol provision device comprising a coil, forming a system.
- the article 1 can include its own heat source, forming an aerosol provision system without requiring a separate aerosol provision device.
- the aerosol generating material 3, also referred to herein as an aerosol generating substrate 3, comprises at least one aerosol forming material.
- the aerosol forming material is glycerol.
- the aerosol forming material can be another material as described herein or a combination thereof.
- the aerosol forming material has been found to improve the sensory performance of the article, by helping to transfer compounds such as flavour compounds from the aerosol generating material to the consumer.
- an issue with adding such aerosol forming materials to the aerosol generating material within an article for use in a non combustible aerosol provision system can be that, when the aerosol forming material is aerosolised upon heating, it can increase the mass of aerosol which is delivered by the article, and this increased mass can maintain a higher temperature as it passes through the mouthpiece. As it passes through the mouthpiece, the aerosol transfers heat into the mouthpiece and this warms the outer surface of the mouthpiece, including the area which comes into contact with the consumers lips during use.
- the mouthpiece temperature can be significantly higher than consumers may be accustomed to when smoking, for instance, conventional cigarettes, and this can be an undesirable effect caused by the use of such aerosol forming materials.
- the mouthpiece 2 of the article 1 comprises an upstream end 2a adjacent to the aerosol generating substrate 3 and a downstream end 2b distal from the aerosol generating substrate 3.
- the mouthpiece 2 has the hollow tubular element 4 formed from filamentary tow. This has advantageously been found to significantly reduce the temperature of the outer surface of the mouthpiece 2 at the downstream end 2b of the mouthpiece which comes into contact with a consumer’s mouth when the article 1 is in use.
- tubular element 4 has also been found to significantly reduce the temperature of the outer surface of the mouthpiece 2 even upstream of the tubular element 4. Without wishing to be bound by theory, it is hypothesised that this is due to the tubular element 4 channelling aerosol closer to the centre of the mouthpiece 2, and therefore reducing the transfer of heat from the aerosol to the outer surface of the mouthpiece 2.
- the body of material 6 and hollow tubular element 4 each define a substantially cylindrical overall outer shape and share a common longitudinal axis.
- the body of material 6 is wrapped in first plug wrap 7.
- the first plug wrap 7 has a basis weight of less than 50 gsm, more preferably between about 20 gsm and 40 gsm.
- the first plug wrap 7 has a thickness of between 30 pm and 60 pm, more preferably between 35 pm and 45 pm.
- the first plug wrap 7 is a non-porous plug wrap, for instance having a permeability of less than 100 Coresta units, for instance less than 50 Coresta units.
- the first plug wrap 7 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta Units.
- the article 1 has an outer circumference of about 17 mm (i.e. the article is in the super-slim format).
- the article can be provided in any of the formats described herein, for instance having an outer circumference of between 15mm and 25mm.
- the outer circumference of the mouthpiece 2 is substantially the same as the outer circumference of the rod of aerosol generating material 3, such that there is a smooth transition between these components.
- the outer circumference of the mouthpiece 2 is about 16.8mm.
- a tipping paper 5 is wrapped around the full length of the mouthpiece 2 and over part of the rod of aerosol generating material 3 and has an adhesive on its inner surface to connect the mouthpiece 2 and rod 3.
- the tipping paper 5 extends 5 mm over the rod of aerosol generating material 3 but it can alternatively extend between 3 mm and 10 mm over the rod 3, or more preferably between 4 mm and 6 mm, to provide a secure attachment between the mouthpiece 2 and rod 3.
- the tipping paper 5 can have a basis weight which is higher than the basis weight of plug wraps used in the article 1, for instance a basis weight of 40 gsm to 80 gsm, more preferably between 50 gsm and 70 gsm, and in the present example 58 gsm. These ranges of basis weights have been found to result in tipping papers having acceptable tensile strength while being flexible enough to wrap around the article 1 and adhere to itself along a longitudinal lap seam on the paper.
- the outer circumference of the tipping paper 5, once wrapped around the mouthpiece 2, is about 21mm.
- the "wall thickness" of the hollow tubular element 4 corresponds to the thickness of the wall of the tube 4 in a radial direction. This may be measured, for example, using a calliper.
- the wall thickness is advantageously greater than 0.9mm, and more preferably 1.0mm or greater.
- the wall thickness is substantially constant around the entire wall of the hollow tubular element 4.
- the wall thickness is preferably greater than 0.9 mm at any point around the hollow tubular element 4, more preferably 1.0mm or greater.
- the length of the hollow tubular element 4 is less than about 20 mm. More preferably, the length of the hollow tubular element 4 is less than about 15 mm. Still more preferably, the length of the hollow tubular element 4 is less than about 10 mm.
- the length of the hollow tubular element 4 is at least about 5 mm.
- the length of the hollow tubular element 4 is at least about 6 mm.
- the length of the hollow tubular element 4 is from about 5 mm to about 20 mm, more preferably from about 6 mm to about 10 mm, even more preferably from about 6 mm to about 8 mm, most preferably about 6 mm, 7 mm or about 8 mm.
- the length of the hollow tubular element 4 is 6 mm.
- a hollow tubular element 4 having a length of greater than about 10mm for instance between about 10mm and about 30mm or between about 12mm and about 25mm. It has been found that a consumer’s lips are likely to extend in some cases to about 12mm from the mouth end of the article 1 when drawing aerosol through the article 1, and therefore a hollow tubular element 4 having a length of at least 10mm or at least 12mm means that most of the consumer’s lips surround this element 4.
- the density of the hollow tubular element 4 is at least about 0.25 grams per cubic centimetre (g/cc), more preferably at least about 0.3 g/cc.
- the density of the hollow tubular element 4 is less than about 0.75 grams per cubic centimetre (g/cc), more preferably less than 0.6 g/cc. In some embodiments, the density of the hollow tubular element 4 is between 0.25 and 0.75 g/ cc, more preferably between 0.3 and 0.6 g/cc, and more preferably between 0.4 g/cc and 0.6 g/cc or about 0.5 g/cc. These densities have been found to provide a good balance between improved firmness afforded by denser material and the lower heat transfer properties of lower density material.
- the "density" of the hollow tubular element 4 refers to the density of the filamentary tow forming the element with any plasticiser incorporated.
- the density may be determined by dividing the total weight of the hollow tubular element 4 by the total volume of the hollow tubular element 4, wherein the total volume can be calculated using appropriate measurements of the hollow tubular element 4 taken, for example, using callipers. Where necessary, the appropriate dimensions may be measured using a microscope.
- the filamentary tow forming the hollow tubular element 4 preferably has a total denier of less than 45,000, more preferably less than 42,000. This total denier has been found to allow the formation of a tubular element 4 which is not too dense.
- the total denier is at least 20,000, more preferably at least 25,000.
- the filamentary tow forming the hollow tubular element 4 has a total denier between 25,000 and 45,000, more preferably between 35,000 and 45,000.
- the cross-sectional shape of the filaments of tow are ⁇ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used.
- the filamentary tow forming the hollow tubular element 4 preferably has a denier per filament of greater than 3. This denier per filament has been found to allow the formation of a tubular element 4 which is not too dense.
- the denier per filament is at least 4, more preferably at least 5.
- the filamentary tow forming the hollow tubular element 4 has a denier per filament between 4 and 10, more preferably between 4 and 9.
- the filamentary tow forming the hollow tubular element 4 has an 8Y40,ooo tow formed from cellulose acetate and comprising 18% plasticiser, for instance triacetin.
- the hollow tubular element 4 preferably has an internal diameter of greater than 3.0mm.
- the hollow tubular element 4 has an internal diameter of greater than 3.1mm, and still more preferably greater than 3.5mm or 3.6mm. In one embodiment, the internal diameter of the hollow tubular element 4 is about 3.9mm.
- the hollow tubular element 4 preferably comprises from 15% to 22% by weight of plasticiser.
- the plasticiser is preferably triacetin, although other plasticisers such as polyethelyne glycol (PEG) can be used. More preferably, the tubular element 4 comprises from 16% to 20% by weight of plasticiser, for instance about 17%, about 18% or about 19% plasticiser.
- the pressure drop or difference (also referred to a resistance to draw) across the mouthpiece, for instance the part of the article 1 downstream of the aerosol generating material 3, is preferably less than about 40 mmH 2 o.
- Such pressure drops have been found to allow sufficient aerosol, including desirable compounds such as flavour compounds, to pass through the mouthpiece 2 to the consumer. More preferably, the pressure drop across the mouthpiece 2 is less than about 32 mmH 2 o.
- particularly improved aerosol has been achieved using a mouthpiece 2 having a pressure drop of less than 31 mmH 2 o, for instance about 29 mmH 2 o, about 28 mmH 2 o or about 27.5 mmH 2 o.
- the mouthpiece pressure drop can be at least 10 mmH 2 o, preferably at least 15 mmH 2 o and more preferably at least 20 mmH 2 o. In some embodiments, the mouthpiece pressure drop can be between about 15 mmH 2 o and 40 mmH 2 o. These values enable the mouthpiece 2 to slow down the aerosol as it passes through the mouthpiece 2 such that the temperature of the aerosol has time to reduce before reaching the downstream end 2b of the mouthpiece 2.
- the hollow tubular element 4 is a first hollow tubular element 4 and the mouthpiece includes a second hollow tubular element 8, also referred to as a cooling element, upstream of the first hollow tubular element 4.
- the second hollow tubular element 8 is upstream of, adjacent to and in an abutting relationship with the body of material 6.
- the body of material 6 and second hollow tubular element 8 each define a substantially cylindrical overall outer shape and share a common longitudinal axis.
- the second hollow tubular element 8 is formed from a plurality of layers of paper which are parallel wound, with butted seams, to form the tubular element 8.
- first and second paper layers are provided in a two-ply tube, although in other examples 3, 4 or more paper layers can be used forming 3, 4 or more ply tubes.
- Other constructions can be used, such as spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mache type process, moulded or extruded plastic tubes or similar.
- the second hollow tubular element 8 can also be formed using a stiff plug wrap and/ or tipping paper as the second plug wrap 9 and/or tipping paper 5 described herein, meaning that a separate tubular element is not required.
- the stiff plug wrap and/or tipping paper is manufactured to have a rigidity that is sufficient to withstand the axial compressive forces and bending moments that might arise during manufacture and whilst the article 1 is in use.
- the stiff plug wrap and/or tipping paper can have a basis weight between 70 gsm and 120 gsm, more preferably between 80 gsm and 110 gsm. Additionally or alternatively, the stiff plug wrap and/or tipping paper can have a thickness between 80 pm and 200 pm, more preferably between 100 pm and 160 pm, or from 120 pm to 150 pm. It can be desirable for both the second plug wrap 9 and tipping paper 5 to have values in these ranges, to achieve an acceptable overall level of rigidity for the second hollow tubular element 8.
- the second hollow tubular element 8 preferably has a wall thickness, which can be measured in the same way as that of the first hollow tubular element 4, of at least about 100 pm and up to about 1.5 mm, preferably between 100 pm and 1 mm and more preferably between 150 pm and 500 pm, or about 300 pm. In the present example, the second hollow tubular element 8 has a wall thickness of about 290 pm.
- the second hollow tubular element 8 has a wall thickness of at least about 325 pm and up to about 2 mm, preferably between 500 pm and 1.5 mm and more preferably between 750 pm and 1 mm.
- the second hollow tubular element 8 can have a wall thickness of about 1 mm.
- the thickness of the wall of the second hollow tubular element 8 is at least 325 microns and, preferably, at least 400, 500, 600, 700, 800, 900 or 1000 microns. In some embodiments, the thickness of the wall of the second hollow tubular element 8 is at least 1250 or 1500 microns.
- the thickness of the wall of the second hollow tubular element 8 is less than 2000 microns and, preferably, less than 1500 microns.
- the increased thickness of the wall of the second hollow tubular element 8 means that it has a greater thermal mass, which has been found to help reduce the temperature of the aerosol passing through the second hollow tubular element 8 and reduce the surface temperature of the mouthpiece at locations downstream of the second hollow tubular element 8.
- the permeability of the second hollow tubular element 8 is at least loo Coresta Units and, preferably, at least 150 or 200 Coresta Units.
- the relatively high permeability of the second hollow tubular element 8 increases the amount of heat that is transferred to the tubular portion from the aerosol and thus reduces the temperature of the aerosol.
- the permeability of the second hollow tubular element 8 has also been found to increase the amount of moisture that is transferred from the aerosol to the second hollow tubular element 8, which has been found to improve the feel of the aerosol in the user’s mouth.
- a high permeability of second hollow tubular element 8 also makes it easier to cut the ventilation holes using a laser, meaning that a lower power of laser can be used.
- the article 1 maybe configured such that there is a separation (i.e. a minimum distance) between a heater of the non-combustible aerosol provision device 100 and the second hollow tubular element 8. This prevents heat from the heater from damaging the material forming the second hollow tubular element 8.
- the minimum distance between a heater of the non-combustible aerosol provision device 100 and the second hollow tubular element 8 may be 3 mm or greater. In some examples, minimum distance between the heater of the non-combustible aerosol provision device 100 and the second hollow tubular element 8 may be in the range 3 mm to 10 mm, for example 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.
- the separation between the heating element of the non-combustible aerosol provision device 100 and the second hollow tubular element 8 may be achieved by, for example, adjusting the length of the aerosol generating material 21.
- the length of the second hollow tubular element 8 is less than about 50 mm. More preferably, the length of the second hollow tubular element 8 is less than about 40 mm. Still more preferably, the length of the second hollow tubular element 8 is less than about 30 mm. In addition, or as an alternative, the length of the second hollow tubular element 8 is preferably at least about 10 mm. Preferably, the length of the second hollow tubular element 8 is at least about 15 mm. In some preferred embodiments, the length of the second hollow tubular element 8 is from about 20 mm to about 30 mm, more preferably from about 22 mm to about 28 mm, even more preferably from about 24 to about 26 mm, most preferably about 25 mm. In the present example, the length of the second hollow tubular element 8 is 25 mm.
- the second hollow tubular element 8 is located around and defines an air gap within the mouthpiece 2 which acts as a cooling segment.
- the air gap provides a chamber through which heated volatilised components generated by the aerosol generating material 3 flow.
- the second hollow tubular element 8 is hollow to provide a chamber for aerosol accumulation yet rigid enough to withstand axial compressive forces and bending moments that might arise during manufacture and whilst the article 1 is in use.
- the second hollow tubular element 8 provides a physical displacement between the aerosol generating material 3 and the body of material 6. The physical displacement provided by the second hollow tubular element 8 will provide a thermal gradient across the length of the second hollow tubular element 8.
- the mouthpiece 2 comprises a cavity having an internal volume greater than 450 mm 3 . Providing a cavity of at least this volume has been found to enable the formation of an improved aerosol. Such a cavity size provides sufficient space within the mouthpiece 2 to allow heated volatilised components to cool, therefore allowing the exposure of the aerosol generating material 3 to higher temperatures than would otherwise be possible, since they may result in an aerosol which is too warm.
- the cavity is formed by the second hollow tubular element 8, but in alternative arrangements it could be formed within a different part of the mouthpiece 2.
- the mouthpiece 2 comprises a cavity, for instance formed within the second hollow tubular element 8, having an internal volume greater than 500 mm3, and still more preferably greater than 550 mm3, allowing further improvement of the aerosol.
- the internal cavity comprises a volume of between about 550 mm 3 and about 750 mm 3 , for instance about 600 mm 3 or 700 mm 3 .
- the second hollow tubular element 8 can be configured to provide a temperature differential of at least 40 degrees Celsius between a heated volatilised component entering a first, upstream end of the second hollow tubular element 8 and a heated volatilised component exiting a second, downstream end of the second hollow tubular element 8.
- the second hollow tubular element 8 is preferably configured to provide a temperature differential of at least 60 degrees Celsius, preferably at least 80 degrees Celsius and more preferably at least 100 degrees Celsius between a heated volatilised component entering a first, upstream end of the second hollow tubular element 8 and a heated volatilised component exiting a second, downstream end of the second hollow tubular element 8. This temperature differential across the length of the second hollow tubular element 8 protects the temperature sensitive body of material 6 from the high temperatures of the aerosol generating material 3 when it is heated.
- the second hollow tubular element 8 can be replaced with an alternative cooling element, for instance an element formed from a body of material which allows aerosol to pass through it longitudinally, and which also performs the function of cooling the aerosol.
- an alternative cooling element for instance an element formed from a body of material which allows aerosol to pass through it longitudinally, and which also performs the function of cooling the aerosol.
- the aerosol generating material described herein is a first aerosol generating material and the second hollow tubular element 8 may include a second aerosol generating material.
- the second hollow tubular element 8 can comprise a wall, which comprises the second aerosol generating material.
- the second aerosol generating material 4b can be disposed on the inner wall of the second hollow tubular element 8.
- the second aerosol generating material comprises at least one aerosol former material, and may also comprise at least one aerosol modifying agent, or other sensate material.
- the aerosol former material and/or aerosol modifying agent can be any aerosol former material or aerosol modifying agent as described herein, or a combination thereof.
- heat from the first aerosol may aerosolise the aerosol forming material of the second aerosol generating material, to form a second aerosol.
- the second aerosol may comprise a flavourant, which may be additional or complementary to the flavour of the first aerosol.
- Providing a second aerosol generating material on the second hollow tubular element 8 can result in generation of a second aerosol which boosts or complements the flavour or visual appearance of the first aerosol.
- the first hollow tubular element 4, body of material 6 and second hollow tubular element 8 are combined using a second plug wrap 9 which is wrapped around all three sections.
- the second plug wrap 9 has a basis weight of less than 50 gsm, more preferably between about 20 gsm and 45 gsm.
- the second plug wrap 9 has a thickness of between 30 pm and 60 pm, more preferably between 35 pm and 45 pm.
- the second plug wrap 9 is preferably a non- porous plug wrap having a permeability of less than 100 Coresta Units, for instance less than 50 Coresta Units.
- the second plug wrap 9 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta Units.
- the aerosol generating material 3 is wrapped in a wrapper 10.
- the wrapper 10 can, for instance, be a paper or paper-backed foil wrapper.
- the wrapper 10 is substantially impermeable to air.
- the wrapper 10 preferably has a permeability of less than 100 Coresta Units, more preferably less than 60 Coresta Units. It has been found that low permeability wrappers, for instance having a permeability of less than 100 Coresta Units, more preferably less than 60 Coresta Units, result in an improvement in the aerosol formation in the aerosol generating material 3. Without wishing to be bound by theory, it is hypothesised that this is due to reduced loss of aerosol compounds through the wrapper 10.
- the permeability of the wrapper 10 can be measured in accordance with ISO 2965:2009 concerning the determination of air permeability for materials used as cigarette papers, filter plug wrap and filter joining paper.
- the wrapper 10 comprises aluminium foil. Aluminium foil has been found to be particularly effective at enhancing the formation of aerosol within the aerosol generating material 3.
- the aluminium foil has a metal layer having a thickness of about 6 pm.
- the aluminium foil has a paper backing.
- the aluminium foil can be other thicknesses, for instance between 4 pm and 16 pm in thickness.
- the aluminium foil also need not have a paper backing, but could have a backing formed from other materials, for instance to help provide an appropriate tensile strength to the foil, or it could have no backing material.
- Metallic layers or foils other than aluminium can also be used.
- the total thickness of the wrapper is preferably between 20 pm and 60 pm, more preferably between 30 pm and 50 pm, which can provide a wrapper having appropriate structural integrity and heat transfer characteristics.
- the tensile force which can be applied to the wrapper before it breaks can be greater than 3,000 grams force, for instance between 3,000 and 10,000 grams force or between 3,000 and 4,500 grams force.
- the wrapper surrounding the aerosol generating material comprises citrate, such as sodium citrate and/ or potassium citrate.
- the wrapper may have a citrate content of 2% by weight or less, or 1% by weight or less. Reducing the citrate content of the wrapper can assist with reducing any visible discolouration of the wrapper during use.
- the article has a ventilation level of about 75% of the aerosol drawn through the article.
- the article can have a ventilation level of between 50% and 80% of aerosol drawn through the article, for instance between 65% and 75%.
- Ventilation at these levels helps to slow down the flow of aerosol drawn through the mouthpiece 2 and thereby enable the aerosol to cool sufficiently before it reaches the downstream end 2b of the mouthpiece 2.
- the ventilation is provided directly into the mouthpiece 2 of the article 1.
- the ventilation is provided into the second hollow tubular element 8, which has been found to be particularly beneficial in assisting with the aerosol generation process.
- the ventilation is provided via first and second parallel rows of perforations 12, in the present case formed as laser perforations, at positions 17.925 mm and 18.625 mm respectively from the downstream, mouth-end 2b of the mouthpiece 2. These perforations pass though the tipping paper 5, second plug wrap 9 and second hollow tubular element 8.
- the ventilation can be provided into the mouthpiece at other locations, for instance into the body of material 6 or first tubular element 4.
- the ventilation can be provided via a single row of perforations, for instance laser perforations, into the portion of the article in which the hollow tubular element is located. This has been found to result in improved aerosol formation, which is thought to result from the airflow through the perforations being more uniform than with multiple rows of perforations, for a given ventilation level.
- Aerosol temperature has been found to generally increase with a drop in the ventilation level.
- the relationship between aerosol temperature and ventilation level does not appear to be linear, with variations in ventilation, for instance due to manufacturing tolerances, having less impact at lower target ventilation levels.
- the aerosol temperature could increase by approximately 6°C at the lower ventilation limit (60% ventilation).
- the aerosol temperature may only increase by approximately 3.5°C at the lower vent limit (45% ventilation).
- the target ventilation level of the article can therefore be within the range 40% to 70%, for instance, 45% to 65%.
- the mean ventilation level of at least 20 articles can be between 40% and 70%, for instance between 45% and 70% or between 51% and 59%.
- the wrapper 10 surrounding the aerosol generating material has a high level of permeability, for example greater than about 1000 Coresta Units, or greater than about 1500 Coresta Units, or greater than about 2000 Coresta Units.
- the permeability of the wrapper 10 can be measured in accordance with ISO 2965:2009 concerning the determination of air permeability for materials used as cigarette papers, filter plug wrap and filter joining paper.
- the wrapper 10 may be formed from a material with a high inherent level of permeability, an inherently porous material, or may be formed from a material with any level of inherent permeability where the final level of permeability is achieved by providing the wrapper 10 with a permeable zone or area. Providing a permeable wrapper 10 provides a route for air to enter the smoking article.
- the wrapper can be provided with a permeability such that the amount of air entering the article through the rod of aerosol generating material is relatively more than the amount of air entering the article through the ventilation area 12 in the mouthpiece. An article having this arrangement may produce a more flavoursome aerosol which maybe more satisfactory to the user.
- the aerosol forming material added to the aerosol generating substrate 3 comprises 14% by weight of the aerosol generating substrate 3.
- the aerosol forming material comprises at least 5% by weight of the aerosol generating substrate, more preferably at least 10%.
- the aerosol forming material comprises less than 25% by weight of the aerosol generating substrate, more preferably less than 20%, for instance between 10% and 20%, between 12% and 18% or between 13% and 16%.
- the aerosol generating material 3 is provided as a cylindrical rod of aerosol generating material. Irrespective of the form of the aerosol generating material, it preferably has a length of about 10 mm to 100 mm. In some embodiments, the length of the aerosol generating material is preferably in the range about 25 mm to 50 mm, more preferably in the range about 30 mm to 45 mm, and still more preferably about 30 mm to 40 mm.
- the volume of aerosol generating material 3 provided can vary from about 200 mm3 to about 4300 mm3, preferably from about 500 mm3 to 1500 mm3, more preferably from about 1000 mm3 o about 1300 mm3.
- the provision of these volumes of aerosol generating material, for instance from about 1000 mm3 to about 1300 mm3, has been advantageously shown to achieve a superior aerosol, having a greater visibility and sensory performance compared to that achieved with volumes selected from the lower end of the range.
- the mass of aerosol generating material 3 provided can be greater than 200 mg, for instance from about 200 mg to 400 mg, preferably from about 230 mg to 360 mg, more preferably from about 250 mg to 360 mg. It has been advantageously found that providing a higher mass of aerosol generating material results in improved sensory performance compared to aerosol generated from a lower mass of tobacco material.
- the aerosol generating material or substrate is formed from tobacco material as described herein, which includes a tobacco component.
- the tobacco component preferably contains paper reconstituted tobacco.
- the tobacco component may also contain leaf tobacco, extruded tobacco, and/or bandcast tobacco.
- the aerosol generating material 3 can comprise reconstituted tobacco material having a density of less than about 700 milligrams per cubic centimetre (mg/cc). Such tobacco material has been found to be particularly effective at providing an aerosol generating material which can be heated quickly to release an aerosol, as compared to denser materials. For instance, the inventors tested the properties of various aerosol generating materials, such as bandcast reconstituted tobacco material and paper reconstituted tobacco material, when heated.
- the density of the aerosol generating material also has an impact on the speed at which heat conducts through the material, with lower densities, for instance those below 700 mg/cc, conducting heat more slowly through the material, and therefore enabling a more sustained release of aerosol.
- the aerosol generating material 3 comprises reconstituted tobacco material having a density of less than about 700 mg/cc, for instance paper reconstituted tobacco material. More preferably, the aerosol generating material 3 comprises reconstituted tobacco material having a density of less than about 600 mg/cc. Alternatively or in addition, the aerosol generating material 3 preferably comprises reconstituted tobacco material having a density of at least 350 mg/ cc, which is considered to allow for a sufficient amount of heat conduction through the material.
- the tobacco material maybe provided in the form of cut rag tobacco.
- the cut rag tobacco can have a cut width of at least 15 cuts per inch (about 5.9 cuts per cm, equivalent to a cut width of about 1.7mm).
- the cut rag tobacco has a cut width of at least 18 cuts per inch (about 7.1 cuts per cm, equivalent to a cut width of about 1.4mm), more preferably at least 20 cuts per inch (about 7.9 cuts per cm, equivalent to a cut width of about 1.27mm).
- the cut rag tobacco has a cut width of 22 cuts per inch (about 8.7 cuts per cm, equivalent to a cut width of about 1.15mm).
- the cut rag tobacco has a cut width at or below 40 cuts per inch (about 15.7 cuts per cm, equivalent to a cut width of about 0.64mm). Cut widths between 0.5 mm and 2.0 mm, for instance between 0.6 mm and 1.5 mm, or between 0.6 mm and 1.7mm, have been found to result in tobacco material which is preferable in terms of surface area to volume ratio, particularly when heated, and the overall density and pressure drop of the substrate 3.
- the cut rag tobacco can be formed from a mixture of forms of tobacco material, for instance a mixture of one or more of paper reconstituted tobacco, leaf tobacco, extruded tobacco and bandcast tobacco.
- the tobacco material comprises paper reconstituted tobacco or a mixture of paper reconstituted tobacco and leaf tobacco.
- the tobacco material may contain a filler component.
- the filler component is generally a non-tobacco component, that is, a component that does not include ingredients originating from tobacco.
- the filler component may be a non-tobacco fibre such as wood fibre or pulp or wheat fibre.
- the filler component may also be an inorganic material such as chalk, perlite, vermiculite, diatomaceous earth, colloidal silica, magnesium oxide, magnesium sulphate, magnesium carbonate.
- the filler component may also be a non-tobacco cast material or a non-tobacco extruded material.
- the filler component maybe present in an amount of o to 20% by weight of the tobacco material, or in an amount of from 1 to 10% by weight of the composition. In some embodiments, the filler component is absent.
- the tobacco material contains an aerosol forming material.
- an "aerosol forming material” is an agent that promotes the generation of an aerosol.
- An aerosol forming material may promote the generation of an aerosol by promoting an initial vaporisation and/or the condensation of a gas to an inhalable solid and/or liquid aerosol.
- an aerosol forming material may improve the delivery of flavour from the aerosol generating material.
- any suitable aerosol forming material or agents may be included in the aerosol generating material of the invention, including those described herein.
- Suitable aerosol forming materials include, but are not limited to: a polyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, high boiling point hydrocarbons, acids such as lactic acid, glycerol derivatives, esters such as diacetin, triacetin, triethylene glycol diacetate, triethyl citrate or myristates including ethyl myristate and isopropyl myristate and aliphatic carboxylic acid esters such as methyl stearate, dimethyl dodecanedioate and dimethyl tetradecanedioate.
- a polyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol
- a non-polyol such as monohydric alcohols, high boiling point hydrocarbons, acids such as lactic acid,
- the aerosol forming material may be glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.
- Glycerol may be present in an amount of from 10 to 20 % by weight of the tobacco material, for example 13 to 16 % by weight of the composition, or about 14% or 15% by weight of the composition.
- Propylene glycol if present, maybe present in an amount of from 0.1 to 0.3% by weight of the composition.
- the aerosol forming material may be included in any component, for example any tobacco component, of the tobacco material, and/or in the filler component, if present.
- the aerosol forming material may be added to the tobacco material separately.
- the total amount of the aerosol forming material in the tobacco material can be as defined herein.
- the tobacco material can contain between 10% and 90% by weight tobacco leaf, wherein the aerosol forming material is provided in an amount of up to about 10% by weight of the leaf tobacco. To achieve an overall level of aerosol forming material between 10% and 20% by weight of the tobacco material, it has been advantageously found that this can be added in higher weight percentages to the another component of the tobacco material, such as reconstituted tobacco material.
- the tobacco material described herein contains nicotine.
- the nicotine content is from 0.5 to 1.75% by weight of the tobacco material, and maybe, for example, from 0.8 to 1.5% by weight of the tobacco material. Additionally or alternatively, the tobacco material contains between 10% and 90% by weight tobacco leaf having a nicotine content of greater than 1.5% by weight of the tobacco leaf. It has been advantageously found that using a tobacco leaf with nicotine content higher than 1.5% in combination with a lower nicotine base material, such as paper reconstituted tobacco, provides a tobacco material with an appropriate nicotine level but better sensory performance than the use of paper reconstituted tobacco alone.
- the tobacco leaf for instance cut rag tobacco, can, for instance, have a nicotine content of between 1.5% and 5% by weight of the tobacco leaf.
- the tobacco material described herein can contain an aerosol modifying agent, such as any of the flavours described herein.
- the tobacco material contains menthol, forming a mentholated article.
- the tobacco material can comprise from 3mg to 2omg of menthol, preferably between 5 mg and i8mg and more preferably between 8mg and i6mg of menthol.
- the tobacco material comprises i6mg of menthol.
- the tobacco material can contain between 2% and 8% by weight of menthol, preferably between 3% and 7% by weight of menthol and more preferably between 4% and 5.5% by weight of menthol.
- the tobacco material includes 4.7% by weight of menthol.
- Such high levels of menthol loading can be achieved using a high percentage of reconstituted tobacco material, for instance greater than 50% of the tobacco material by weight.
- a high volume of aerosol generating material for instance tobacco material
- aerosol generating material can increase the level of menthol loading that can be achieved, for instance where greater than about 500 mm3 or suitably more than about 1000 mm3 of aerosol generating material, such as tobacco material, are used.
- any water that may be present in the tobacco material, or in any component thereof, is entirely disregarded for the purposes of the determination of the weight %.
- the water content of the tobacco material described herein may vary and may be, for example, from 5 to 15% by weight.
- the water content of the tobacco material described herein may vary according to, for example, the temperature, pressure and humidity conditions at which the compositions are maintained. The water content can be determined by Karl-Fisher analysis, as known to those skilled in the art.
- any component other than water is included in the weight of the tobacco material.
- the aerosol forming material is not included in the weight of the tobacco component or filler component, but is included in the weight of the "aerosol forming material" in the weight % as defined herein. All other ingredients present in the tobacco component are included in the weight of the tobacco component, even if of non-tobacco origin (for example non tobacco fibres in the case of paper reconstituted tobacco).
- the tobacco material comprises the tobacco component as defined herein and the aerosol forming material as defined herein. In an embodiment, the tobacco material consists essentially of the tobacco component as defined herein and the aerosol forming material as defined herein. In an embodiment, the tobacco material consists of the tobacco component as defined herein and the aerosol forming material as defined herein.
- Paper reconstituted tobacco is present in the tobacco component of the tobacco material described herein in an amount of from 10% to 100% by weight of the tobacco component.
- the paper reconstituted tobacco is present in an amount of from 10% to 80% by weight, or 20% to 70% by weight, of the tobacco component.
- the tobacco component consists essentially of, or consists of, paper reconstituted tobacco.
- leaf tobacco is present in the tobacco component of the tobacco material in an amount of from at least 10% by weight of the tobacco component.
- leaf tobacco can be present in an amount of at least 10% by weight of the tobacco component, while the remainder of the tobacco component comprises paper reconstituted tobacco, bandcast reconstituted tobacco, or a combination of bandcast reconstituted tobacco and another form of tobacco such as tobacco granules.
- Paper reconstituted tobacco refers to tobacco material formed by a process in which tobacco feedstock is extracted with a solvent to afford an extract of solubles and a residue comprising fibrous material, and then the extract (usually after concentration, and optionally after further processing) is recombined with fibrous material from the residue (usually after refining of the fibrous material, and optionally with the addition of a portion of non-tobacco fibres) by deposition of the extract onto the fibrous material.
- the process of recombination resembles the process for making paper.
- the paper reconstituted tobacco may be any type of paper reconstituted tobacco that is known in the art.
- the paper reconstituted tobacco is made from a feedstock comprising one or more of tobacco strips, tobacco stems, and whole leaf tobacco.
- the paper reconstituted tobacco is made from a feedstock consisting of tobacco strips and/or whole leaf tobacco, and tobacco stems.
- scraps, fines and winnowings can alternatively or additionally be employed in the feedstock.
- the paper reconstituted tobacco for use in the tobacco material described herein may be prepared by methods which are known to those skilled in the art for preparing paper reconstituted tobacco.
- the mouthpiece 2 comprises a single body of material 6.
- the mouthpiece of Figure la may include multiple bodies of material.
- the mouthpiece 2 may comprise a cavity between the bodies of material.
- the mouthpiece 2 downstream of the aerosol generating material 3 can comprise a wrapper, for instance the first or second plug wraps 7, 9, or tipping paper 5, which comprises an aerosol modifying agent as described herein.
- the aerosol modifying agent may be disposed on an inwardly or outwardly facing surface of the mouthpiece wrapper.
- the aerosol modifying agent may be provided on an area of the wrapper, such as an outwardly facing surface of the tipping paper 5, which comes into contact with the consumer’s lips during use.
- the aerosol modifying agent may be transferred to the consumer’s lips during use.
- Transfer of the aerosol modifying agent to the consumer’s lips during use of the article may modify the organoleptic properties (e.g. taste) of the aerosol generated by the aerosol generating substrate 3 or otherwise provide the consumer with an alternative sensory experience.
- the aerosol modifying agent may impart flavour to the aerosol generated by the aerosol generating substrate 3.
- the aerosol modifying agent may be at least partially soluble in water such that it is transferred to the user via the consumer’s saliva.
- the aerosol modifying agent may be one that volatilises by the heat generated by the aerosol provision system. This may facilitate transfer of the aerosol modifying agent to the aerosol generated by the aerosol generating substrate 3.
- a suitable sensate material may be a flavour as described herein, sucralose or a cooling agent such as menthol or similar.
- a non-combustible aerosol provision device is used to heat the aerosol generating material 3 of the article 1 described herein.
- the non-combustible aerosol provision device preferably comprises a coil, since this has been found to enable improved heat transfer to the article 1 as compared to other arrangements.
- the coil is configured to, in use, cause heating of at least one electrically-conductive heating element, so that heat energy is conductible from the at least one electrically-conductive heating element to the aerosol generating material to thereby cause heating of the aerosol generating material.
- the coil is configured to generate, in use, a varying magnetic field for penetrating at least one heating element, to thereby cause induction heating and/ or magnetic hysteresis heating of the at least one heating element.
- the or each heating element may be termed a “susceptor” as defined herein.
- a coil that is configured to generate, in use, a varying magnetic field for penetrating at least one electrically-conductive heating element, to thereby cause induction heating of the at least one electrically-conductive heating element may be termed an “induction coil” or “inductor coil”.
- the device may include the heating element(s), for example electrically-conductive heating element(s), and the heating element(s) maybe suitably located or locatable relative to the coil to enable such heating of the heating element(s).
- the heating element(s) may be in a fixed position relative to the coil.
- the at least one heating element for example at least one electrically-conductive heating element, may be included in the article 1 for insertion into a heating zone of the device, wherein the article 1 also comprises the aerosol generating material 3 and is removable from the heating zone after use.
- both the device and such an article 1 may comprise at least one respective heating element, for example at least one electrically- conductive heating element, and the coil may be to cause heating of the heating element(s) of each of the device and the article when the article is in the heating zone.
- the coil is helical. In some examples, the coil encircles at least a part of a heating zone of the device that is configured to receive aerosol generating material. In some examples, the coil is a helical coil that encircles at least a part of the heating zone.
- the device comprises an electrically-conductive heating element that at least partially surrounds the heating zone, and the coil is a helical coil that encircles at least a part of the electrically-conductive heating element.
- the electrically-conductive heating element is tubular.
- the coil is an inductor coil.
- the use of a coil enables the non-combustible aerosol provision device to reach operational temperature more quickly than a non-coil aerosol provision device.
- the non-combustible aerosol provision device including a coil as described above can reach an operational temperature such that a first puff can be provided in less than 30 seconds from initiation of a device heating program, more preferably in less than 25 seconds.
- the device can reach an operational temperature in about 20 seconds from the initiation of a device heating program.
- the burning coal In FMC products, the burning coal generates a hot aerosol which heats tobacco in the tobacco rod behind the coal, as the aerosol is drawn through the rod.
- This hot aerosol is understood to release flavour compounds from tobacco in the rod behind the burning coal.
- a device including a coil as described herein is thought to also be capable of heating aerosol generating material, such as tobacco material described herein, to release flavour compounds, resulting in an aerosol which has been reported to more closely resemble an FMC aerosol.
- an aerosol provision system including a coil as described herein, for instance an induction coil which heats at least some of the aerosol generating material to at least 200°C, more preferably at least 220°C, can enable the generation of an aerosol from an aerosol generating material that has particular characteristics which are thought to more closely resemble those of an FMC product.
- an aerosol generating material including nicotine
- an induction heater heated to at least 250°C, for a two-second period
- an airflow of at least i.50L/m during the period one or more of the following characteristics has been observed: at least 10 pg of nicotine is aerosolised from the aerosol generating material; the weight ratio in the generated aerosol, of aerosol forming material to nicotine is at least about 2.5:1, suitably at least 8.5:1; at least 100 pg of the aerosol forming material can be aerosolised from the aerosol generating material; the mean particle or droplet size in the generated aerosol is less than about 1000 nm; and the aerosol density is at least 0.1 pg/ cc.
- At least 10 pg of nicotine is aerosolised from the aerosol generating material under an airflow of at least l.soL/m during the period.
- less than about 200 pg, suitably less than about 150 pg or less than about 125 pg, of nicotine is aerosolised from the aerosol generating material under an airflow of at least l.soL/m during the period.
- the aerosol contains at least 100 pg of the aerosol forming material, suitably at least 200 pg, 500 pg or 1 mg of aerosol forming material is aerosolised from the aerosol generating material under an airflow of at least l.soL/m during the period.
- the aerosol forming material may comprise or consist of glycerol.
- mean particle or droplet size refers to the mean size of the solid or liquid components of an aerosol (i.e. the components suspended in a gas). Where the aerosol contains suspended liquid droplets and suspended solid particles, the term refers to the mean size of all components together.
- the mean particle or droplet size in the generated aerosol may be less than about 900 nm, 800 nm, 700, nm 600 nm, soonm, 450nm or 400 nm. In some cases, the mean particle or droplet size maybe more than about 25 nm, 50 nm or loonm.
- the aerosol density generated during the period is at least 0.1 pg/cc. In some cases, the aerosol density is at least 0.2 pg/cc, 0.3 pg/cc or 0.4 pg/cc. In some cases, the aerosol density is less than about 2.5 pg/cc, 2.0 pg/cc, 1.5 pg/cc or 1.0 pg/cc.
- the non-combustible aerosol provision device is preferably arranged to heat the aerosol generating material 3 of the article 1, to a maximum temperature of at least i6o°C.
- the non-combustible aerosol provision device is arranged to heat the aerosol forming material 3 of the article 1, to a maximum temperature of at least about 200°C, or at least about 220°C, or at least about 240°C, more preferably at least about 270°C, at least once during the heating process followed by the non-combustible aerosol provision device.
- an aerosol provision system including a coil as described herein, for instance an induction coil which heats at least some of the aerosol generating material to at least 200°C, more preferably at least 220°C, can enable the generation of an aerosol from an aerosol generating material in an article 1 as described herein that has a higher temperature as the aerosol leaves the mouth end of the mouthpiece 2 than previous devices, contributing to the generation of an aerosol which is considered closer to an FMC product.
- the maximum aerosol temperature measured at the mouth-end of the article 1 can preferably be greater than 50°C, more preferably greater than 55°C and still more preferably greater than 56°C or 57°C.
- the maximum aerosol temperature measured at the mouth-end of the article 1 can be less than 62°C, more preferably less than 6o°C and more preferably less than 59°C. In some embodiments, the maximum aerosol temperature measured at the mouth-end of the article 1 can preferably be between 50°C and 62°C, more preferably between s6°C and 6o°C.
- Figure 2 shows an example of a non-combustible aerosol provision device 100 for generating aerosol from an aerosol generating medium/material such as the aerosol generating material 3 of the articles 1 described herein.
- the device 100 maybe used to heat a replaceable article no comprising the aerosol generating medium, for instance the articles 1 described herein, to generate an aerosol or other inhalable medium which is inhaled by a user of the device 100.
- the device 100 and replaceable article 110 together form a system.
- the device 100 comprises a housing 102 (in the form of an outer cover) which surrounds and houses various components of the device 100.
- the device 100 has an opening 104 in one end, through which the article 110 maybe inserted for heating by a heating assembly. In use, the article no may be fully or partially inserted into the heating assembly where it may be heated by one or more components of the heater assembly.
- the device 100 of this example comprises a first end member 106 which comprises a lid 108 which is moveable relative to the first end member 106 to close the opening 104 when no article 110 is in place.
- the lid 108 is shown in an open configuration, however the lid 108 may move into a closed configuration.
- a user may cause the lid 108 to slide in the direction of arrow “B”.
- the device 100 may also include a user-operable control element 112, such as a button or switch, which operates the device 100 when pressed. For example, a user may turn on the device 100 by operating the switch 112.
- the device 100 may also comprise an electrical component, such as a socket/port 114, which can receive a cable to charge a battery of the device 100.
- a socket/port 114 which can receive a cable to charge a battery of the device 100.
- the socket 114 maybe a charging port, such as a USB charging port.
- Figure 3 depicts the device 100 of Figure 2 with the outer cover 102 removed and without an article 110 present.
- the device 100 defines a longitudinal axis 134.
- the first end member 106 is arranged at one end of the device 100 and a second end member 116 is arranged at an opposite end of the device 100.
- the first and second end members 106, 116 together at least partially define end surfaces of the device 100.
- the bottom surface of the second end member 116 at least partially defines a bottom surface of the device 100.
- Edges of the outer cover 102 may also define a portion of the end surfaces.
- the lid 108 also defines a portion of a top surface of the device 100.
- the end of the device closest to the opening 104 may be known as the proximal end (or mouth end) of the device 100 because, in use, it is closest to the mouth of the user.
- a user inserts an article 110 into the opening 104, operates the user control 112 to begin heating the aerosol generating material and draws on the aerosol generated in the device. This causes the aerosol to flow through the device 100 along a flow path towards the proximal end of the device 100.
- the other end of the device furthest away from the opening 104 may be known as the distal end of the device 100 because, in use, it is the end furthest away from the mouth of the user. As a user draws on the aerosol generated in the device, the aerosol flows away from the distal end of the device 100.
- the device 100 further comprises a power source 118.
- the power source 118 maybe, for example, a battery, such as a rechargeable battery or a non-rechargeable battery.
- suitable batteries include, for example, a lithium battery (such as a lithium-ion battery), a nickel battery (such as a nickel-cadmium battery), and an alkaline battery.
- the battery is electrically coupled to the heating assembly to supply electrical power when required and under control of a controller (not shown) to heat the aerosol generating material.
- the battery is connected to a central support 120 which holds the battery 118 in place.
- the device further comprises at least one electronics module 122.
- the electronics module 122 may comprise, for example, a printed circuit board (PCB).
- the PCB 122 may support at least one controller, such as a processor, and memory.
- the PCB 122 may also comprise one or more electrical tracks to electrically connect together various electronic components of the device 100.
- the battery terminals maybe electrically connected to the PCB 122 so that power can be distributed throughout the device 100.
- the socket 114 may also be electrically coupled to the battery via the electrical tracks.
- the heating assembly is an inductive heating assembly and comprises various components to heat the aerosol generating material of the article 110 via an inductive heating process.
- Induction heating is a process of heating an electrically conducting object (such as a susceptor) by electromagnetic induction.
- An induction heating assembly may comprise an inductive element, for example, one or more inductor coils, and a device for passing a varying electric current, such as an alternating electric current, through the inductive element.
- the varying electric current in the inductive element produces a varying magnetic field.
- the varying magnetic field penetrates a susceptor suitably positioned with respect to the inductive element, and generates eddy currents inside the susceptor.
- the susceptor has electrical resistance to the eddy currents, and hence the flow of the eddy currents against this resistance causes the susceptor to be heated by Joule heating.
- the susceptor comprises ferromagnetic material such as iron, nickel or cobalt
- heat may also be generated by magnetic hysteresis losses in the susceptor, i.e. by the varying orientation of magnetic dipoles in the magnetic material as a result of their alignment with the varying magnetic field.
- inductive heating as compared to heating by conduction for example, heat is generated inside the susceptor, allowing for rapid heating. Further, there need not be any physical contact between the inductive heater and the susceptor, allowing for enhanced freedom in construction and application.
- the induction heating assembly of the example device 100 comprises a susceptor arrangement 132 (herein referred to as “a susceptor”), a first inductor coil 124 and a second inductor coil 126.
- the first and second inductor coils 124, 126 are made from an electrically conducting material.
- the first and second inductor coils 124, 126 are made from Litz wire/ cable which is wound in a helical fashion to provide helical inductor coils 124, 126.
- Litz wire comprises a plurality of individual wires which are individually insulated and are twisted together to form a single wire. Litz wires are designed to reduce the skin effect losses in a conductor.
- the first and second inductor coils 124, 126 are made from copper Litz wire which has a rectangular cross section. In other examples the Litz wire can have other shape cross sections, such as circular.
- the first inductor coil 124 is configured to generate a first varying magnetic field for heating a first section of the susceptor 132 and the second inductor coil 126 is configured to generate a second varying magnetic field for heating a second section of the susceptor 132.
- the first inductor coil 124 is adjacent to the second inductor coil 126 in a direction along the longitudinal axis 134 of the device 100 (that is, the first and second inductor coils 124, 126 to not overlap).
- the susceptor arrangement 132 may comprise a single susceptor, or two or more separate susceptors. Ends 130 of the first and second inductor coils 124, 126 can be connected to the PCB 122.
- first and second inductor coils 124, 126 may have at least one characteristic different from each other.
- the first inductor coil 124 may have at least one characteristic different from the second inductor coil 126.
- the first inductor coil 124 may have a different value of inductance than the second inductor coil 126.
- the first and second inductor coils 124, 126 are of different lengths such that the first inductor coil 124 is wound over a smaller section of the susceptor 132 than the second inductor coil 126.
- the first inductor coil 124 may comprise a different number of turns than the second inductor coil 126 (assuming that the spacing between individual turns is substantially the same).
- the first inductor coil 124 may be made from a different material to the second inductor coil 126.
- the first and second inductor coils 124, 126 maybe substantially identical.
- the first inductor coil 124 and the second inductor coil 126 are wound in opposite directions. This can be useful when the inductor coils are active at different times. For example, initially, the first inductor coil 124 maybe operating to heat a first section/portion of the article 110, and at a later time, the second inductor coil 126 may be operating to heat a second section/portion of the article no. Winding the coils in opposite directions helps reduce the current induced in the inactive coil when used in conjunction with a particular type of control circuit. In Figure 3, the first inductor coil 124 is a right-hand helix and the second inductor coil 126 is a left-hand helix.
- the inductor coils 124, 126 may be wound in the same direction, or the first inductor coil 124 may be a left-hand helix and the second inductor coil 126 may be a right-hand helix.
- the susceptor 132 of this example is hollow and therefore defines a receptacle within which aerosol generating material is received.
- the article 110 can be inserted into the susceptor 132.
- the susceptor 120 is tubular, with a circular cross section.
- the susceptor 132 maybe made from one or more materials.
- the susceptor 132 comprises carbon steel having a coating of Nickel or Cobalt.
- the susceptor 132 may comprise at least two materials capable of being heated at two different frequencies for selective aerosolization of the at least two materials.
- a first section of the susceptor 132 (which is heated by the first inductor coil 124) may comprise a first material
- a second section of the susceptor 132 which is heated by the second inductor coil 126 may comprise a second, different material.
- the first section may comprise first and second materials, where the first and second materials can be heated differently based upon operation of the first inductor coil 124.
- the first and second materials maybe adjacent along an axis defined by the susceptor 132, or may form different layers -within the susceptor 132.
- the second section may comprise third and fourth materials, where the third and fourth materials can be heated differently based upon operation of the second inductor coil 126.
- the third and fourth materials maybe adjacent along an axis defined by the susceptor 132, or may form different layers within the susceptor 132.
- Third material may the same as the first material, and the fourth material may be the same as the second material, for example. Alternatively, each of the materials may be different.
- the susceptor may comprise carbon steel or aluminium for example.
- the device 100 of Figure 3 further comprises an insulating member 128 which may be generally tubular and at least partially surround the susceptor 132.
- the insulating member 128 may be constructed from any insulating material, such as plastic for example.
- the insulating member is constructed from polyether ether ketone (PEEK).
- PEEK polyether ether ketone
- the insulating member 128 can also fully or partially support the first and second inductor coils 124, 126.
- the first and second inductor coils 124, 126 are positioned around the insulating member 128 and are in contact with a radially outward surface of the insulating member 128.
- the insulating member 128 does not abut the first and second inductor coils 124, 126.
- a small gap may be present between the outer surface of the insulating member 128 and the inner surface of the first and second inductor coils 124, 126.
- the susceptor 132, the insulating member 128, and the first and second inductor coils 124, 126 are coaxial around a central longitudinal axis of the susceptor 132.
- Figure 4 shows a side view of device 100 in partial cross-section.
- the outer cover 102 is present in this example.
- the rectangular cross-sectional shape of the first and second inductor coils 124, 126 is more clearly visible.
- the device 100 further comprises a support 136 which engages one end of the susceptor 132 to hold the susceptor 132 in place.
- the support 136 is connected to the second end member 116.
- the device may also comprise a second printed circuit board 138 associated within the control element 112.
- the device 100 further comprises a second lid/cap 140 and a spring 142, arranged towards the distal end of the device 100.
- the spring 142 allows the second lid 140 to be opened, to provide access to the susceptor 132.
- a user may open the second lid 140 to clean the susceptor 132 and/or the support 136.
- the device 100 further comprises an expansion chamber 144 which extends away from a proximal end of the susceptor 132 towards the opening 104 of the device. Located at least partially within the expansion chamber 144 is a retention clip 146 to abut and hold the article no when received within the device 100.
- the expansion chamber 144 is connected to the end member 106.
- Figure 5 is an exploded view of the device 100 of Figure 4, with the outer cover 102 omitted.
- Figure 6A depicts a cross section of a portion of the device 100 of Figure 4.
- Figure 6B depicts a close-up of a region of Figure 6A.
- Figures 6A and 6B show the article no received within the susceptor 132, where the article no is dimensioned so that the outer surface of the article no abuts the inner surface of the susceptor 132. This ensures that the heating is most efficient.
- the article no of this example comprises aerosol generating material 110a.
- the aerosol generating material 110a is positioned within the susceptor 132.
- the article no may also comprise other components such as a filter, wrapping materials and/ or a cooling structure.
- Figure 6B shows that the outer surface of the susceptor 132 is spaced apart from the inner surface of the inductor coils 124, 126 by a distance 150, measured in a direction perpendicular to a longitudinal axis 158 of the susceptor 132.
- the distance 150 is about 3mm to 4mm, about 3-3-5mm, or about 3.25mm.
- Figure 6B further shows that the outer surface of the insulating member 128 is spaced apart from the inner surface of the inductor coils 124, 126 by a distance 152, measured in a direction perpendicular to a longitudinal axis 158 of the susceptor 132.
- the distance 152 is about 0.05mm.
- the distance 152 is substantially omm, such that the inductor coils 124, 126 abut and touch the insulating member 128.
- the susceptor 132 has a wall thickness 154 of about 0.025mm to imm, or about 0.05mm.
- the susceptor 132 has a length of about 40mm to 60mm, about 40mm to 45mm, or about 44.5mm.
- the insulating member 128 has a wall thickness 156 of about 0.25mm to 2mm, 0.25mm to imm, or about 0.5mm.
- the articles 1 described herein can be inserted into a non-combustible aerosol provision device such as the device 100 described with reference to Figures 2 to 6. At least a portion of the mouthpiece 2 of the article 1 protrudes from the non-combustible aerosol provision device 100 and can be placed into a user’s mouth.
- An aerosol is produced by heating the aerosol generating material 3 using the device 100. The aerosol produced by the aerosol generating material 3 passes through the mouthpiece 2 to the user’s mouth.
- the minimum distance between the one or more components of the heater assembly and a tubular element of the article 1 may be in the range 3 mm to 10 mm, for example 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.
- the articles 1 described herein have particular advantages, for instance when used with non-combustible aerosol provision devices such as the device 100 described with reference to Figures 2 to 6.
- the first tubular element 4 formed from filamentary tow has surprisingly been found to have a significant influence on the temperature of the outer surface of the mouthpiece 2 of the articles 1.
- an outer surface of the outer wrapper at a longitudinal position corresponding to the location of the hollow tubular element 4 has been found to reach a maximum temperature of less than 42°C during use, suitably less than 40°C and more suitably less than 38°C or less than 36°C.
- Table 3.0 below shows the temperature of the outer surface of the article 1 as described with reference to Figures la and lb herein when heated using the device 100 described with reference to Figures 2 to 6 herein.
- First, second and third temperature measuring probes were used as corresponding first, second and third positions along the mouthpiece 2 of the article 1.
- the first position (numbered as position 1 in table 2.0) was at 4mm from the downstream end 2b of the mouthpiece 2
- the second position (numbered as position 2 in table 2.0) was at 8mm from the downstream end 2b of the mouthpiece 2
- the third position (numbered as position 3 in table 2.0) was at 12mm from the downstream end 2b of the mouthpiece 2.
- the first position was therefore on the outer surface of the part of the mouthpiece 2 in which the first tubular element 4 is disposed, while the second and third positions were on the outer surface of the part of the mouthpiece 2 in which the body of material 6 is disposed.
- a control article was tested for comparison with the filamentary tow tubular elements 4 described herein, and used instead of the filamentaiy tow tubular element 4 a known spirally wrapped paper tube having the same construction as the second hollow tubular element 8 described herein, but a length of 6mm rather than 25mm.
- Figure 7 illustrates a method of manufacturing an article as described herein.
- a feed mechanism configured to dispense additive release components at a predetermined longitudinal spacing into a flow of fibrous tow material.
- the fibrous tow material comprises cellulose acetate tow
- the additive release components comprise breakable capsules 11a, 11b.
- the feed mechanism comprises a horizontally oriented disk assembly for receiving the breakable capsules, and a vertically oriented rotary delivery wheel for delivering the capsules into the flow of fibrous tow.
- Known machinery for the insertion of a capsule into a flow of fibrous tow material may be modified to achieve insertion of the at least two breakable capsules of the present invention.
- the at least two additive release components are dispensed from the feed mechanism into the flow of fibrous tow material.
- the fibrous tow, now containing the at least two additive release components is passed through a garniture and paper wrapped to form a rod.
- the paper wrap comprises oil- resistant plug wrap 7.
- the rod is cut to form a mouthpiece rod containing at least two additive release components.
- the formed mouthpiece rod maybe combined with further mouthpiece sections and/or a source of aerosol generating material to form an article.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB1918983.6A GB201918983D0 (en) | 2019-12-20 | 2019-12-20 | A component for an article for use in an aerosol delivery system |
PCT/GB2020/053319 WO2021123833A1 (en) | 2019-12-20 | 2020-12-21 | A component for an article for use in an aerosol delivery system |
Publications (1)
Publication Number | Publication Date |
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EP4076035A1 true EP4076035A1 (en) | 2022-10-26 |
Family
ID=69322782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20838243.2A Pending EP4076035A1 (en) | 2019-12-20 | 2020-12-21 | A component for an article for use in an aerosol delivery system |
Country Status (11)
Country | Link |
---|---|
US (1) | US20230031144A1 (ja) |
EP (1) | EP4076035A1 (ja) |
JP (1) | JP2023507157A (ja) |
KR (1) | KR20220118506A (ja) |
CN (1) | CN115135180A (ja) |
AU (1) | AU2020410194B2 (ja) |
BR (1) | BR112022012275A2 (ja) |
CA (1) | CA3162036A1 (ja) |
GB (1) | GB201918983D0 (ja) |
IL (1) | IL293722A (ja) |
WO (1) | WO2021123833A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2024003308A1 (en) * | 2022-06-30 | 2024-01-04 | Philip Morris Products S.A. | Aerosol-generating article having two aerosol-generating segments |
WO2024003315A1 (en) * | 2022-06-30 | 2024-01-04 | Philip Morris Products S.A. | Aerosol-generating article having two or more substrate segments |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2709077B2 (ja) * | 1987-05-29 | 1998-02-04 | 日本たばこ産業株式会社 | 煙草用フィルター |
KR20030009800A (ko) * | 2001-07-24 | 2003-02-05 | 김진희 | 담배맛 변경이 가능한 담배 |
GB201220280D0 (en) * | 2012-11-12 | 2012-12-26 | British American Tobacco Co | Products including capsules, uses and preparation thereof |
EP3355725B1 (en) * | 2015-09-29 | 2021-04-07 | British American Tobacco Mexico, S.A. De C.V. | A method for manufacturing different types of smoking article |
GB201608931D0 (en) * | 2016-05-20 | 2016-07-06 | British American Tobacco Co | Article for use in apparatus for heating smokeable material |
US10499686B2 (en) * | 2017-06-23 | 2019-12-10 | Altria Client Services Llc | Smoking article filter with flavorant delivery system |
GB201717567D0 (en) * | 2017-10-25 | 2017-12-06 | British American Tobacco Investments Ltd | A filter for a smoking article or an aerosol generating product |
-
2019
- 2019-12-20 GB GBGB1918983.6A patent/GB201918983D0/en not_active Ceased
-
2020
- 2020-12-21 CN CN202080097136.2A patent/CN115135180A/zh active Pending
- 2020-12-21 IL IL293722A patent/IL293722A/en unknown
- 2020-12-21 WO PCT/GB2020/053319 patent/WO2021123833A1/en unknown
- 2020-12-21 EP EP20838243.2A patent/EP4076035A1/en active Pending
- 2020-12-21 BR BR112022012275A patent/BR112022012275A2/pt unknown
- 2020-12-21 US US17/757,457 patent/US20230031144A1/en active Pending
- 2020-12-21 AU AU2020410194A patent/AU2020410194B2/en active Active
- 2020-12-21 JP JP2022537092A patent/JP2023507157A/ja active Pending
- 2020-12-21 KR KR1020227024846A patent/KR20220118506A/ko unknown
- 2020-12-21 CA CA3162036A patent/CA3162036A1/en active Pending
Also Published As
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US20230031144A1 (en) | 2023-02-02 |
BR112022012275A2 (pt) | 2022-08-30 |
AU2020410194A1 (en) | 2022-07-07 |
CN115135180A (zh) | 2022-09-30 |
KR20220118506A (ko) | 2022-08-25 |
WO2021123833A1 (en) | 2021-06-24 |
AU2020410194B2 (en) | 2024-06-13 |
JP2023507157A (ja) | 2023-02-21 |
CA3162036A1 (en) | 2021-06-24 |
GB201918983D0 (en) | 2020-02-05 |
IL293722A (en) | 2022-08-01 |
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